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321 Stainless Steel

-111 Products

321 Product Guide Product   | 321 Stainless Steel Tolerance Guide product

Reinforced with titanium, 321 stainless steel excels in high temperature environments, providing resistance to cracking and corrosion. Additionally, 321 stainless resists scaling at higher temperatures. The addition of titanium means that welding is not suggested for this alloy. Typically used in aircraft engines, expansion joints, thermal equipment, refinery equipment, and high temperature chemical processing equipment. In the automotive industry 321 is used for headers and exhaust systems.

 

We carry 321 in hex bar, cold finish hex bar, rectangle bar, annealed rectangle bar, round bar, round tube, seamless round tube, and sheet/plate.

 

NEW! - We offer waterjet services for this product. Learn More | Request Quote >

 

Relevant Knowledge Hub Resources: 5 Reasons to Cut to Size | The Weldability of Stainless Steel

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0.105" Stainless Sheet 321 - 
Part #: 9775

0.105" Stainless Sheet 321 -
Part #: 9775

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Dimensions

  • Thickness: 0.105"
  • Gauge: 12 Gauge
  • Covering: Pvc 1 Side
See all available dimensions for this product
  • 12″ X 12″ (1 X 1 ft.) - $222.75 ea.
  • 12″ X 24″ (1 X 2 ft.) - $268.75 ea.
  • 12″ X 36″ (1 X 3 ft.) - $303.40 ea.
  • 12″ X 48″ (1 X 4 ft.) - $337.35 ea.
  • 24″ X 24″ (2 X 2 ft.) - $337.35 ea.
  • 24″ X 36″ (2 X 3 ft.) - $367.95 ea.
  • 24″ X 48″ (2 X 4 ft.) - $428.80 ea.
  • 36″ X 36″ (3 X 3 ft.) - $454.15 ea.
  • 36″ X 48″ (3 X 4 ft.) - $537.00 ea.
  • 36″ X 60″ (3 X 5 ft.) - $630.00 ea.
  • 36″ X 96″ (3 X 8 ft.) - $1,361.64 ea.
  • 48″ X 48″ (4 X 4 ft.) - $679.25 ea.
  • 48″ X 60″ (4 X 5 ft.) - $765.05 ea.
  • 48″ X 72″ (4 X 6 ft.) - $1,118.39 ea.
  • 48″ X 84″ (4 X 7 ft.) - $1,283.09 ea.
  • 48″ X 96″ (4 X 8 ft.) - $1,101.10 ea.
  • 48″ X 120″ (4 X 10 ft.) - $1,127.25 ea.
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

$222.75 ea.
$222.75 for 1

0.135" Stainless Sheet 321 - 
Part #: 9776

0.135" Stainless Sheet 321 -
Part #: 9776

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Dimensions

  • Thickness: 0.135"
  • Covering: Pvc 1 Side
See all available dimensions for this product
  • 12″ X 12″ (1 X 1 ft.) - $263.25 ea.
  • 12″ X 24″ (1 X 2 ft.) - $346.15 ea.
  • 12″ X 36″ (1 X 3 ft.) - $407.95 ea.
  • 12″ X 48″ (1 X 4 ft.) - $469.95 ea.
  • 24″ X 24″ (2 X 2 ft.) - $469.95 ea.
  • 24″ X 36″ (2 X 3 ft.) - $536.25 ea.
  • 24″ X 48″ (2 X 4 ft.) - $641.60 ea.
  • 36″ X 36″ (3 X 3 ft.) - $685.10 ea.
  • 36″ X 48″ (3 X 4 ft.) - $826.50 ea.
  • 36″ X 60″ (3 X 5 ft.) - $981.00 ea.
  • 36″ X 96″ (3 X 8 ft.) - $1,361.20 ea.
  • 36″ X 120″ (3 X 10 ft.) - $1,566.90 ea.
  • 48″ X 48″ (4 X 4 ft.) - $1,068.21 ea.
  • 48″ X 60″ (4 X 5 ft.) - $1,212.64 ea.
  • 48″ X 72″ (4 X 6 ft.) - $1,410.77 ea.
  • 48″ X 84″ (4 X 7 ft.) - $1,624.21 ea.
  • 48″ X 96″ (4 X 8 ft.) - $1,773.20 ea.
  • 48″ X 120″ (4 X 10 ft.) - $1,883.25 ea.
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

$263.25 ea.
$263.25 for 1

0.1875" Stainless Sheet 321 - 
Part #: 9777

0.1875" Stainless Sheet 321 -
Part #: 9777

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Dimensions

  • Thickness: 0.1875"
  • Gauge: 7 Gauge
  • Covering: Pvc 1 Side
See all available dimensions for this product
  • 12″ X 12″ (1 X 1 ft.) - $312.75 ea.
  • 12″ X 24″ (1 X 2 ft.) - $440.75 ea.
  • 12″ X 36″ (1 X 3 ft.) - $535.05 ea.
  • 12″ X 48″ (1 X 4 ft.) - $631.80 ea.
  • 24″ X 24″ (2 X 2 ft.) - $631.80 ea.
  • 24″ X 36″ (2 X 3 ft.) - $740.85 ea.
  • 24″ X 48″ (2 X 4 ft.) - $897.60 ea.
  • 36″ X 36″ (3 X 3 ft.) - $964.10 ea.
  • 36″ X 48″ (3 X 4 ft.) - $1,177.50 ea.
  • 36″ X 60″ (3 X 5 ft.) - $1,407.00 ea.
  • 36″ X 120″ (3 X 10 ft.) - $2,489.59 ea.
  • 48″ X 48″ (4 X 4 ft.) - $1,540.11 ea.
  • 48″ X 60″ (4 X 5 ft.) - $1,753.18 ea.
  • 48″ X 72″ (4 X 6 ft.) - $1,804.25 ea.
  • 48″ X 84″ (4 X 7 ft.) - $2,083.28 ea.
  • 48″ X 96″ (4 X 8 ft.) - $2,588.30 ea.
  • 48″ X 120″ (4 X 10 ft.) - $2,755.35 ea.
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

$312.75 ea.
$312.75 for 1

1/4" Stainless Plate 321 - 
Part #: 9778

1/4" Stainless Plate 321 -
Part #: 9778

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stainless-plate-316-annealed-hrap-1superZoom

Dimensions

  • Thickness: 0.25"
  • Covering: Pvc 1 Side
See all available dimensions for this product
  • 12″ X 12″ (1 X 1 ft.) - $312.75 ea.
  • 12″ X 24″ (1 X 2 ft.) - $440.75 ea.
  • 12″ X 36″ (1 X 3 ft.) - $535.05 ea.
  • 12″ X 48″ (1 X 4 ft.) - $631.80 ea.
  • 24″ X 24″ (2 X 2 ft.) - $631.80 ea.
  • 24″ X 36″ (2 X 3 ft.) - $740.85 ea.
  • 24″ X 48″ (2 X 4 ft.) - $897.60 ea.
  • 36″ X 36″ (3 X 3 ft.) - $964.10 ea.
  • 36″ X 48″ (3 X 4 ft.) - $1,177.50 ea.
  • 36″ X 60″ (3 X 5 ft.) - $1,407.00 ea.
  • 48″ X 48″ (4 X 4 ft.) - $1,540.11 ea.
  • 48″ X 60″ (4 X 5 ft.) - $1,753.18 ea.
  • 48″ X 72″ (4 X 6 ft.) - $2,622.46 ea.
  • 48″ X 84″ (4 X 7 ft.) - $3,037.82 ea.
  • 48″ X 96″ (4 X 8 ft.) - $2,588.30 ea.
  • 48″ X 120″ (4 X 10 ft.) - $2,755.35 ea.
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

$312.75 ea.
$312.75 for 1

1 1/2" Stainless Round Bar 321-Annealed - 
Part #: 12884

1 1/2" Stainless Round Bar 321-Annealed -
Part #: 12884

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stainless-round-bar-321-cold-finish-1superZoom

Dimensions

  • Diameter: 1.5"
See all available dimensions for this product
  • 12″ (1 ft.) - $178.69 ea.
  • 24″ (2 ft.) - $347.67 ea.
  • 36″ (3 ft.) - $474.54 ea.

    Buy 4 at the 12 ft price!

  • 48″ (4 ft.) - $591.69 ea.
  • 72″ (6 ft.) - $835.68 ea.
  • 96″ (8 ft.) - $1,040.83 ea.
  • 144″ (12 ft.) - $1,295.65 ea.
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.
Create Custom Cut

QTY

$178.69 ea.
$178.69 for 1

1/2" Stainless Round Bar 321 - 
Part #: 13602

1/2" Stainless Round Bar 321 -
Part #: 13602

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stainless-round-bar-321-cold-finish-1superZoom

Dimensions

  • Diameter: 0.5"
See all available dimensions for this product
  • 12″ (1 ft.) - $44.75 ea.
  • 24″ (2 ft.) - $87.07 ea.
  • 36″ (3 ft.) - $118.81 ea.

    Buy 4 at the 12 ft price!

  • 48″ (4 ft.) - $148.15 ea.
  • 72″ (6 ft.) - $209.26 ea.
  • 96″ (8 ft.) - $260.61 ea.
  • 144″ (12 ft.) - $324.44 ea.
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.
Create Custom Cut

QTY

$44.75 ea.
$44.75 for 1

3/8" OD x 0.095" Wall x 0.185" ID Stainless Round Tube 321 Seamless - 
Part #: 23519

3/8" OD x 0.095" Wall x 0.185" ID Stainless Round Tube 321 Seamless-
Part #: 23519

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stainless-round-tube-316-seamless-1superZoom

Dimensions

  • Outer Diameter: 0.375"
  • Wall: 0.095"
  • Inner Diameter: 0.185"
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

3/4" Stainless Plate 321 - 
Part #: 20156

3/4" Stainless Plate 321-
Part #: 20156

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Dimensions

  • Thickness: 0.75"
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

1/2" Stainless Plate 321 - 
Part #: 21114

1/2" Stainless Plate 321-
Part #: 21114

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Dimensions

  • Thickness: 0.5"
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

1 1/4" Stainless Plate 321 - 
Part #: 21183

1 1/4" Stainless Plate 321-
Part #: 21183

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Dimensions

  • Thickness: 1.25"
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

4 1/2" Stainless Round Bar T-321 - 
Part #: 23922

4 1/2" Stainless Round Bar T-321-
Part #: 23922

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Dimensions

  • Diameter: 4.5"
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

2" Stainless Plate 321 - 
Part #: 25670

2" Stainless Plate 321-
Part #: 25670

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Dimensions

  • Thickness: 2"
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

7" Stainless Round Bar 321 Cold Finish - 
Part #: 27939

7" Stainless Round Bar 321 Cold Finish-
Part #: 27939

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Dimensions

  • Diameter: 7"
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

3/8" OD x 0.035" Wall x 0.305" ID Stainless Round Tube 321 Seamless - 
Part #: 28171

3/8" OD x 0.035" Wall x 0.305" ID Stainless Round Tube 321 Seamless-
Part #: 28171

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Dimensions

  • Outer Diameter: 0.375"
  • Wall: 0.035"
  • Inner Diameter: 0.305"
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

1/2" OD x 0.035" Wall x 0.43" ID Stainless Round Tube 321 Seamless - 
Part #: 28172

1/2" OD x 0.035" Wall x 0.43" ID Stainless Round Tube 321 Seamless-
Part #: 28172

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Dimensions

  • Outer Diameter: 0.5"
  • Wall: 0.035"
  • Inner Diameter: 0.43"
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

1" OD x 0.028" Wall x 0.944" ID Stainless Round Tube 321 Seamless - 
Part #: 28434

1" OD x 0.028" Wall x 0.944" ID Stainless Round Tube 321 Seamless-
Part #: 28434

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Dimensions

  • Outer Diameter: 1"
  • Wall: 0.028"
  • Inner Diameter: 0.944"
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

1 1/2" Stainless Plate 321 - 
Part #: 28478

1 1/2" Stainless Plate 321-
Part #: 28478

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Dimensions

  • Thickness: 1.5"
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

1/4" x 1 1/2" Stainless Rectangle Bar 321-Annealed and Pickled - 
Part #: 28456

1/4" x 1 1/2" Stainless Rectangle Bar 321-Annealed and Pickled-
Part #: 28456

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Dimensions

  • Thickness: 0.25"
  • Width: 1.5"
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

1" Stainless Plate 321 - 
Part #: 27566

1" Stainless Plate 321-
Part #: 27566

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Dimensions

  • Thickness: 1"
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

1 1/2" OD x 0.035" Wall x 1.43" ID Stainless Round Tube 321 Seamless - 
Part #: 27715

1 1/2" OD x 0.035" Wall x 1.43" ID Stainless Round Tube 321 Seamless-
Part #: 27715

Click for more details

stainless-round-tube-316-seamless-1superZoom

Dimensions

  • Outer Diameter: 1.5"
  • Wall: 0.035"
  • Inner Diameter: 1.43"
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

1.5" OD x 0.065" Wall x 1.37" ID 321 Stainless Steel Round Tube Welded-#8 Mirror Polished - 
Part #: mp-00038235

1.5" OD x 0.065" Wall x 1.37" ID 321 Stainless Steel Round Tube Welded-#8 Mirror Polished -
Part #: mp-00038235

Click for more details

Dimensions

  • Outer Diameter: 1.5"
  • Wall: 0.065"
  • Inner Diameter: 1.37"
  • Ships In: 1-3 Business Days
See all available dimensions for this product
  • 60″ (5 ft.) - $362.95 ea.
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.
Create Custom Cut

QTY

$362.95 ea.
$362.95 for 1
Sold and shipped by Stainless Headers Mfg.

2.5" OD x 0.065" Wall x 2.37" ID 321 Stainless Steel Round Tube Welded-#8 Mirror Polished - 
Part #: mp-00038240

2.5" OD x 0.065" Wall x 2.37" ID 321 Stainless Steel Round Tube Welded-#8 Mirror Polished -
Part #: mp-00038240

Click for more details

Dimensions

  • Outer Diameter: 2.5"
  • Wall: 0.065"
  • Inner Diameter: 2.37"
  • Ships In: 1-3 Business Days
See all available dimensions for this product
  • 12″ (1 ft.) - $72.95 ea.
  • 24″ (2 ft.) - $159.95 ea.
  • 60″ (5 ft.) - $571.95 ea.
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.
Create Custom Cut

QTY

$72.95 ea.
$72.95 for 1
Sold and shipped by Stainless Headers Mfg.

1.875" OD x 0.065" Wall x 1.745" ID 321 Stainless Steel Round Tube Welded-#4 Brushed Finish - 
Part #: mp-00038228

1.875" OD x 0.065" Wall x 1.745" ID 321 Stainless Steel Round Tube Welded-#4 Brushed Finish -
Part #: mp-00038228

Click for more details

Dimensions

  • Outer Diameter: 1.875"
  • Wall: 0.065"
  • Inner Diameter: 1.745"
  • Ships In: 1-3 Business Days
See all available dimensions for this product
  • 24″ (2 ft.) - $84.95 ea.
  • 36″ (3 ft.) - $178.95 ea.
  • 60″ (5 ft.) - $241.95 ea.
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.
Create Custom Cut

QTY

$84.95 ea.
$84.95 for 1
Sold and shipped by Stainless Headers Mfg.

3" OD x 0.049" Wall x 2.902" ID 321 Stainless Steel Round Tube Welded-#4 Brushed Finish - 
Part #: mp-00038232

3" OD x 0.049" Wall x 2.902" ID 321 Stainless Steel Round Tube Welded-#4 Brushed Finish -
Part #: mp-00038232

Click for more details

Dimensions

  • Outer Diameter: 3"
  • Wall: 0.049"
  • Inner Diameter: 2.902"
  • Ships In: 1-3 Business Days
See all available dimensions for this product
  • 36″ (3 ft.) - $675.95 ea.
  • 60″ (5 ft.) - $870.95 ea.
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.
Create Custom Cut

QTY

$675.95 ea.
$675.95 for 1
Sold and shipped by Stainless Headers Mfg.

2" OD x 0.035" Wall x 1.93" ID 321 Stainless Steel Round Tube Welded-#4 Brushed Finish - 
Part #: mp-00038227

2" OD x 0.035" Wall x 1.93" ID 321 Stainless Steel Round Tube Welded-#4 Brushed Finish -
Part #: mp-00038227

Click for more details

Dimensions

  • Outer Diameter: 2"
  • Wall: 0.035"
  • Inner Diameter: 1.93"
  • Ships In: 1-3 Business Days
See all available dimensions for this product
  • 12″ (1 ft.) - $135.95 ea.
  • 24″ (2 ft.) - $269.95 ea.
  • 36″ (3 ft.) - $528.95 ea.
  • 60″ (5 ft.) - $676.95 ea.
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.
Create Custom Cut

QTY

$135.95 ea.
$135.95 for 1
Sold and shipped by Stainless Headers Mfg.
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